Output. Nitrogen in Nitrogen through Weight of Excrement Food. Kidneys. (dry). May 18 8.668 grams. 6.06 grams. 14 grams. 19 6.474 7.17 39 20 6.691 6.33 30 -- 21 8.345 6.78 83 contain 6.06% N. = 5.03 grm. N. 22 7.015 5.70 .. 23 9.726 5.75 38 24 10.424 6.39 57 ------ ---- -- 95 contain 5.76% N. = 5.47 grm. N. ---- 10.50 grm. N. 57.343 44.18 + 10.50 grams nitrogen. ------ ------------- 57.343 grams N. 54.68 grams nitrogen. Nitrogen balance for seven days = +2.663 grams. Nitrogen balance per day = +0.380 gram. The average daily intake of nitrogen was 8.192 grams, equivalent to 51.2 grams of proteid food. The average amount of nitrogen excreted through the kidneys each day was 6.31 grams, corresponding to a metabolism of 39.43 grams of proteid matter. The plus balance of 0.380 gram of nitrogen per day shows that not only was the amount of proteid food consumed quite adequate to meet the demands of the body, but the latter was able to store up 2.3 grams of proteid per day. Regarding the character of the food taken by this subject, it should be stated that there was gradually developed a tendency toward a pure vegetarian diet. During the last seven months of the experiment, meats were almost entirely excluded. The diet voluntarily selected thus differed decidedly from that of the preceding subject in that it was much more bulky, contained a larger proportion of undigestible vegetable matter, and was richer in fats and carbohydrates, with a corresponding increase in fuel value. The exact character of the daily dietary is indicated by the following data of food consumption, on four of the days of the above balance period: _May 19._ Breakfast.--Banana 102 grams, wheat rolls 50 grams, coffee 150 grams, cream 50 grams, sugar 21 grams. Lunch.--Omelette 20 grams, bread 57 grams, hominy 137 grams, syrup 68 grams, potatoes 128 grams, coffee 100 grams, cream 50 grams, sugar 21 grams. Dinner.--Tomato purée 200 grams, bread 24 grams, fried sweet potato 100 grams, spinach 70 grams, Indian meal 100 grams, syrup 25 grams, coffee 100 grams, cream 40 grams, sugar 21 grams. Total nitrogen content of the day’s food = 6.474 grams. _May 20._